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H. B. LOGAN. DEVICE FOR OVERCOMING DEAU CENTERS.

m m n mu W a fi nv a m mu o H m o o P Q O O O 0 APPLICATION FILED OCT. 4, 1915.

H. B. LOGAN.

DEVICE FOR OVERCI JMING DEAD CENTERS.

APPLICATION FILED ocT. 4. 1915.

3 SHEETSSHEET 2.

H. B. LOGAN DEVICE FOR OVERCOMING DEAD CENTERS.

APPLiCATlON FILED ()(IT 4 1935.

Patented Aug". 8, 1916.

3 SHEETS-SHEET 3.-

W W w HARRY B. LOGAN, 0F IBEAUCOUP, ILLINOIS, ASSIGNOR OF ONE-HALF TO THOMAS J.

LOGAN, OF BEAUCOUP, ILLINOIS. v

DEVICE FOR OVEBCOMING DEAD-CENTERS.

Application filed October 4, 1915.

To all whom it may concern:

Be it known that I, HARRY B. LOGAN, a citizen of the United States, residing at Beaucoup, in the county of "Washington and State of Illinois, have invented certain new and useful Improvements in Devices for Overcoming Dead-Centers, of which the following is a specification.

This invention relates to improvements in devices for throwing engines and like devices oif the center, and has for one of its objects to improve the construction and increase the efliciency and utility of devices of this character.

Another object of the invention is to provide a simply constructed device which may be applied without material structural change to engines and similar mechanism of various makes and constructions.

With these and other objects in view the invention consists in certain novel features of construction as hereafter shown and described and then specifically pointed out in the claims.

The improved device may be applied without material structural change to engines and similar mechanism of various forms, and it is not desired therefore to limit the invention in any manner in this respect, but for the purpose of illustration the device is shown applied to a conventional traction engine to which it is more peculiarly applicable, and also to a conventional stationary engine, and in the drawings thus employed Figure 1 is a side elevation of a portion of a conventional traction engine with the improvement applied; Fig. 2 is a plan view of the parts shown in Fig. 1; Fig. 3 is a side elevation of a conventional stationary steam engine, illustrating the manner of applying the improved device to engines of this class; Fig. 41 is a side view of the face plate portion of a steam engine illustrating a modification in the construetion.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters.

The improved device may be applied to various mechanical devices in which reciprocal motion is transformed into circular motion, or vice versa, and including a reciproeating member and rotating member as new Specification of Letters Patent.

Patented Aug. 8, 1916.

Serial No. 54,003.

ally disclosed in steam engines and like de vices, and may be applied directly to the face plate when applied to engines of this class, as shown in Figs. 1, 2 and 4, or to a fly wheel or other like part as shown in Fig. 3.

In Figs. 1 and 2 the device is shown applied to a conventional traction or agricultural .engine, and in these figures the boiler is represented conventionally at 10, the main drive shaft at 11 having a fly wheel 12 and carrying the face plate 13 of the engine, these parts being mounted by suitable brackets 14.-15 upon the boiler. The cylinder of the engine is represented at 16 and the connecting rod at 17 coupled in the usual manner to the wrist pin 18 of the faceplate 13.

Bearing upon the rim of the face plate 13 are gear segments 19 being secured to the face plate by any suitable means, for instance by bolts or similar devices 20.

The segments may be located at any desired portions of the face plate, but one of the segments will preferably be located at the side nearest to the wrist pin 18 and the other segment at the diametrically opposite portion, as illustrated in Fig. 1.

When applied to engines already manufactured, the segments may be applied as shown in Figs. 1 and 2, but when applied to new engines, the segmentally arranged teeth may be formed directly in the face plate, as shown in Fig. 4:.

A shaft 21 is mounted for rotation upon the boiler 10 by suitable standards 22, and carries a mutilated gear 23 upon one end, the teeth of the latter gear adapted to en- 'age the teeth of the segments when the shaft 21 is located in one position, and the portion of the gear 23 which is without teeth spaced from the teeth of the segments when the shaft 21 is arranged in another position, as illustrated in Figs. 1 and 3. The center of the'main shaft 11 and the center of the counter-shaft 21 are constantly in the same plane as the line of travel of the piston, and the center of the main shaft, the centers of the segments and the centers of the wrist pin 18 are also constantly in the same plane, while the centers of the main shaft, counter-shafts, gear segments and wrist pin are in the same plane as the line of movement of the piston at the ends of the forward and backward stroke.

I actuating the shaft 21, but for the purpose of illustration the shaft 21 is provided with a chain wheel 21 carrying a chain 25 which engages with another chain Wheel 26 on a shaft 27, the latter being supported by a standard 28 attached to the boiler 10. The

shaft 27 is provided with a crank wheel 29, whereby the shaft may be actuated. The shaft 27 is preferably located near the rear end of the boiler so that the wheel 29 may be readily actuated from the drivers platform, a portion of which is represented at 30. By this means it will be obvious that when the wheel 29 is rotated to actuate the shaft 27 the motion of the latter will be imparted through the wheel 26, chain 25 and wheel 24 to the shaft 21 and thus cause the teeth of the mutilated gear 23 to engage the segment 19 which for the time being is adj acent thereto and thus rotate the face plate 18.

While the engine is running normally th attachment will .not be required and the parts will be so arranged that the untoothed portion of the member 23 will remain next to the segment 19, but if the engine stops on the center either at the forward or return stroke it can be quickly thrown over by actuating the wheel 29, as will be obvious. By employing two of the segments 19 the device is operative to throw the engine 01f vices in which a crank is employed in place of a face plate, as shown at 81 in Fig. 3,

. the gear segments 19 will be applied to the fly wheel 12, and the mutilated gear 23 and its shaft 21 supported in any suitable manner from a stationary support, as for in stance by a bracket 32 from the pillow block 33, as shown in Fig. 3. In this illustration the chain wheels are not shown to simplify the illustration.

. Having thus described the invention, what is claimed as new is 1. The combination with a reciprocating engine including a cylinder piston c0nnect-.

ing rod and crank plate, of gear segments carried by'the crank plate at opposite sides thereof, a counter-shaft mountedfor rotation, a mutilated gear carried by the counter shaft, the mutilated portion of the gear being disposed normally next to the pathsof the segments, and means for rotating said counter-shaft to dispose the teeth of said mutilated gear in the paths of said segments.

2. The combination with a reciprocating engine including a cylinder piston connecting rod and crank plate, of gear segments carried by the crank plate at opposite sides thereof, a mutilated gear mounted for rotation, the mutilated portion of the gear being disposed normally next to the paths of the segments, and means for rotating said mutilated gear to dispose the teeth of the same in the paths of said segments.

In testimony whereof I afiix my signature.

HARRY B. LOGAN. [n s]- Gopi es of this patent may be obtained forfive cents each, by addressing the Commissioner of Patents,

Washington, D. O. 

